well the car wont start. i stalled out about a week ago at a light, and from there on the car will not start. i got new "used" coils. the leading coils register in at .3 ohm. and the trailing coils register in at .5 ohm. the fsm states that they must be in between .2 and 1 ohm. i also checked the crank angle sensor. the resistance between the n1 and n2, and g1 and g2, are the same at 150. i cleaned the sparkplugs considering there only about 3 months old. the wires are still good. and how can the wires mess up there not broken or anything. i also did the defloodation process but it still wont start. the fuel is all fine. i disconnected it after the fuel pump. and gas comes out. alot. so i assume its a electrical prob. i do notice that the rpm gauge does not jump or anything when trying to start the car. do rx7s have ecus? sorry im new. but the only thing that i saw was a cpu. and theres really nothing in there that deals with ignition. the fueses are all fine. unless theres a fuse hidden for just the engine electrical. all replys will be helpful thank you.

 

^

 

A little more info would be helpful. That is, model year or series of the car, turbo or NA, mods, and so on. How long have you had the car? How was it running prior to this problem?

I assume the starter turns the engine over? Were the spark plugs wet when you removed them? Despite the fact that you tried deflooding the engine, my GUESS is that the engine flooded when you stalled it--especially if the engine was cold when it stalled. Try the following: Remove the leading plugs, remove the EGI fuse, crank the car for about 20-30 secs, squirt a little oil (an ounce or so) into each plug hole, replace the plugs and EGI fuse. Try to start the engine normally. If your car is an S4 (86-88) leave your foot off the gas pedal. If it's an S5 (89-91) press the gas pedal to the floor when cranking the engine.

Assuming the engine is not flooded, the basics are: check for spark at the plugs, check for fuel at the engine, and check engine compression. If any of those are lacking, the engine will not start.

(BTW, you can download a factory service manual for your car from one of the links in the 2nd gen FAQ at the top of this section of the forum. There is a troubleshooting matrix in the manual that will help you diagnose your problem.)

Oh, the bump police will getcha if you do that in this section.

 

87 S4 Non Turbo

 

Yep, its probably MEGA flooded, and yes these cars have ECU's. Can you tow start it?

 

the plugs show normal wear, idk how to test for a spark. i dont have a compression tester. so i will go get some things this weekend

 

the reason that i changed the coils were because my friend told me to change them cause he said my old ones were bad. he took a spark plug out and he grounded it and he said thers no spark. thats why i have new "used" coils and ignitors. i do remember when i broke down my battery was dissconnected. i hope my ecu is not fried. if thats possible. where is the ecu located. and why is it not in the fsm

 

no one has had this prob b4

 

ecu is in on the floor in front of the passenger seat.

 

could have flooded...
pull the plugs, pull the EGI fuse, tunr the key, hold the pedal down, wait for gas cloud to stop, clean plugs, try again...maybe use a little automatic tranny fluid? put it in the plug holes after the gas is all out...not much though.....crank motor by hand using the pulley and turn it a few times....re-install the EGI and plugs then try it...make sure your battery is fully charged when you do this.

 

what does the car do when it turns over...does it pop and try to start...turns over slowly or fast? give some more details.

 

Yeah, we all have.. Tow start it!

 

it starts like normal. i have a optima red top batt. and im using my 240 which also has a red top to jump so i have full volts at all times. it sounds normal. no clouds. just cranks. i tried the deflooding. im sure theres no more gas in the housings. i feel that maby the ecu is f'ed up. so im in search of another ecu for a s4 nonturbo. if anyone has one. i need it

 

How did you deflood it?

 

take the plugs out. take out the egi fuse. crank for like a long *** time. untill i smell no more gas. pour some automatic transmission fluid, clean plugs, replace plugs, replace plug wires. replace egi fuse. crank without pressing on the gas. no start. i have no spark. ive already tested it by, taking out a spark plug. and ground it, have a friend start the car. and tehres no spark at the plug. i tried it to all 4 coils. and the coils are fine. considering the trailing reads at .3 ohm and the leading at .5 ohm. the crank angle sensor reads at 150 ohm and the n and g prongs. i took gas feed line to check if fuel pump is fine. and it is. so i believe my ecu is messed up.

 

Oh... yeah. no spark bad. Still have your old coils? If so, toss'em in and see if that works. Other than that, check all of your fuses...

Sounds like you already knew what the problem was when you posted.

 

Did you look at the engine bay fuses? If you can pull the fuel rail can you see if fuel is coming out? Is the wiring to your MAF ok?

I know someone that can probably get me a **** ton of S4 NA ECUs for cheap, if you want i can call him up and ask.

 

well, 9 times out of 10 the problem is not with the ecu. ECU's are not as complicated of things as people think. They get sensor inputs in, and send outputs out. Check to see if your injectors are firing(using a voltmeter at the connector). and make sure you have enough fuel pressure. How sure are you that the crank angle sensor is ok? if you have no spark and no injector toggle, i would look at the crank angle sensor, or the ECU after.

 

did u crank it without the egi fuse in to check for spark because if u did then the spark plugs wont spark?

 

yep. no EGI fuse = no sparking.

the ECU's on these cars almost never die.

for no apparent reason today my vert decided it doesn't want to start, I haven't looked at it yet to find out why.

 

Well, considering you just said that ECU's never die.. your vert's ECU probably died.... You brought it upon yourself!

 

yes i did check for spark with the egi fuse in. well imma go take it out today since i have time.

 

well then it seems that i am that 1 outta 10 where the ecu is messed up.

 

well i took out my ecu. and it smells burnt. like how it smelled when i fried my xmods when i put 8 camera batteris in it. so my ecu is the prob. and its a n326, so imma need that. thanks guys for all the help.

 

Using atf is bad, you really dont want to do that because if you dont burn that out it will eat away at all the soft seals in the engine.